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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Mollusca (clams, snails, squids, and relatives)
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Class Bivalvia
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Order Pholadomyoida
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Family Lyonsiidae
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Genus Lyonsia
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Species Lyonsia arenosa
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Species Lyonsia argentea
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Species Lyonsia bracteata
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Species Lyonsia bulla
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Species Lyonsia californica
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Species Lyonsia floridana
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Species Lyonsia formosa
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Species Lyonsia granulifera
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Species Lyonsia hyalina
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Species Lyonsia lucasana
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Species Lyonsia magnifica
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Species Lyonsia norvegica
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Species Lyonsia norwegica
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Species Lyonsia striata
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